Abstract
The kinetics of the solid-state transformation of marcasite to pyrite have been investigated using infrared spectroscopy. Kinetic analysis using the Johnson-Mehl or Avrami-Erofe'ev equation is based on measurements of infrared absorption intensity made on marcasite samples heated in the temperature range of 698–735 K. From the Arrhenius equation, an activation energy of 253 ± 8 kJ/mol and frequency factor of 4.6 × 1015/min is calculated for the conversion from marcasite to pyrite. The transformation is modeled by a second-order Johnson-Mehl equation suggesting a nucleation and growth model for the formation of pyrite in the marcasite matrix.
This content is PDF only. Please click on the PDF icon to access.
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
